Wagon wheels 0 Overview Using this Resource Connecting to the Curriculum Marking Student Responses Further Resources This task is about changes to metal when it is heated or cooled. Question 1Change answer Years ago, wooden wheels had iron rims fitted. To fit the iron rim, it was heated, then put around the wooden wheel and allowed to cool. a) What two main changes happen to the iron as it is heated? Years ago, wooden wheels had iron rims fitted. To fit the iron rim, it was heated, then put around the wooden wheel and allowed to cool. a) What two main changes happen to the iron as it is heated? 1. 2. Question 1Change answer Once the iron rim is on the wooden wheel it cools. b) What two main changes happen to the iron as it cools? Once the iron rim is on the wooden wheel it cools. b) What two main changes happen to the iron as it cools? 1. 2. Task administration: This task can be completed with pencil and paper or online. Level: 4 Curriculum info: Science, Knowledge, Material World Keywords: changes, metals, temperature Description of task: Task: Describe changes to iron as it is heated or cooled. Assessment focus: changes to metals as they are heated and cooled. Answers/responses: Y8 (05/2000) a) the iron/metal is more malleable/bendable/melts. the iron/metal expands. NOTE: a colour change from grey to red was also accepted. easy very difficult b) the iron/metal hardens. the iron/metal contracts/shrinks/tightens. NOTE: a colour change from red to grey was also accepted. easy very difficult Can you see through it? Building with aluminium Attractive paper clips Properties of metals Using a metals key
